# Gemini 3.1 Pro Preview Custom Tools API prices

Gemini 3.1 Pro Preview Custom Tools (gemini-pro) — 1.0M context, 66k max output.
12 metered per-token offers from 12 provider(s), in USD per 1M tokens.
Prices as of 2026-10-04.

| Provider | Input $/1M | Output $/1M | Cache read $/1M | Context |
| --- | --- | --- | --- | --- |
| AIHubMix | $2 | $12 | $0.2 | 1.0M |
| Databricks | $2 | $12 | $0.2 | 1.0M |
| Eden AI | $2 | $12 | $0.2 | 1.0M |
| Google | $2 | $12 | $0.2 | 1.0M |
| Vertex | $2 | $12 | $0.2 | 1.0M |
| Kilo Gateway | $2 | $12 | $0.2 | 1.0M |
| Merge Gateway | $2 | $12 | $0.2 | 1.0M |
| NanoGPT | $2 | $12 | $0.2 | 1.0M |
| Neon | $2 | $12 | $0.2 | 1.0M |
| OpenRouter | $2 | $12 | $0.2 | 1.0M |
| OrcaRouter | $2 | $12 | $0.2 | 1.0M |
| Tempr Gateway | $2 | $12 | $0.2 | 1.0M |

## Summary

- Cheapest input: $2 per 1M tokens (AIHubMix)
- Cheapest output: $12 per 1M tokens (AIHubMix)
- First-party: $12 per 1M output tokens (Google)
- Free offers: none
- Subscription plans (not per-token): none
- Released: 2026-02-19
- Inputs: audio, image, pdf, text, video

## FAQ

### What is the cheapest Gemini 3.1 Pro Preview Custom Tools API?

As of Oct 4, 2026, AIHubMix has the lowest Gemini 3.1 Pro Preview Custom Tools output price at $12 per 1M tokens, and AIHubMix has the lowest input price at $2 per 1M tokens. Prices are metered per-token rates in USD; free tiers and subscription plans are excluded.

### How much does Gemini 3.1 Pro Preview Custom Tools cost on Google?

Google charges $2 per 1M input tokens and $12 per 1M output tokens for Gemini 3.1 Pro Preview Custom Tools.

### How many providers offer Gemini 3.1 Pro Preview Custom Tools?

12 providers list Gemini 3.1 Pro Preview Custom Tools on Sovyron; 12 of them sell it at a metered per-token price.

### Is Gemini 3.1 Pro Preview Custom Tools free?

No provider in the Sovyron catalog lists a free tier for Gemini 3.1 Pro Preview Custom Tools.

### What is the context window of Gemini 3.1 Pro Preview Custom Tools?

Gemini 3.1 Pro Preview Custom Tools supports a 1.0M-token context window and up to 66k output tokens.

HTML page: https://sovyron.com/models/gemini-3-1-pro-preview-custom-tools/
Full dataset: https://sovyron.com/data/catalog.json